OF WASHINGTON. 205 



Abdomen not carinate along the sides, normal. 



Labrum inconspicuous or hidden 3 



Labrum conspicuous. 



Metathorax with a median carina, the spiracles large, 

 oblong or oval; flagellum subclavate, densely 

 hairy, the joints of funicle wider than long. 



10. Cleonymus Latr. 



Metathorax without a median carina, the spiracles 

 small, rounded, flagellum long, filiform, densely 

 hairy, the joints of funicle long. 



n. Micradelus Walk. 



3. Front wings bifasciate or maculate. 



Marginal vein slender, about twice as long as the stigmal ; pro- 

 notum not short, the metathorax with a median carina, the 

 head lenticular, much wider than thorax. 



14. Ptinobius Ashm. 



4. Front wings bifasciate. 



Marginal vein not longer than the stigmal, the latter long, 

 strongly clavate ; pronotum short, transverse, slightly nar 

 rowed, the metathorax with a short median keel, the spiracles 

 elliptic, the head transverse; pedicel shorter than the first joint 



of funicle 17. Chiropachys Westw. 



Front wings hyaline, not fasciate. 



Marginal vein longer than the stigmal, the latter not especially 

 long, ending in a small knob; pronotum large, subquadrate, 

 wejl separated 18. Schizonotus Ratzb. 



5. Mesothoracic furrows complete 6 



Mesothoracic furrows incomplete or indicated only anteriorly. 



Pronotum short, narrowed medially. 



Marginal vein thickened, shorter than the postmarginal. 



21. Zapachia Forst. 

 Marginal vein usually not thickened. 



Stigmal club very large Acrocormus Forst. 



Stigmal club small 23. Caudonia Walk. 



Pronotum long, narrowed anteriorly 24. Notanisus Walk. 



6. Abdomen petiolate 8 



Abdomen sessile. 



Scutellum without a transverse grooved line before tip 7 



Scutellum with a transverse grooved line before tip. 



Pronotum large, nearly quadrate 25. Merostenus Walk. 



= Pterolytus Ratzb. 

 Pronotum transverse, but still not very short. 



26. Trigonoderus Westw. 



Pronotum very short, visible from above as a fine trans 

 verse line. 



